by 
Big Jake
ANSWERS: 2
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No... it contracts. That's why it breaks up into rocks instead of just remaining one huge sheet - as it cools, it contracts, and cracks. Only one substance known to man expands when it cools: water. And that's only at the freezing point.
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I believe that anything and everything shrinks as it cools but has a chance of expanding as it freezes. When particles heat up they accelerate and their vibrations get larger pushing them farther away from other particles. I know that water expands as it freezes, I don't remember the details on other things freezing though. Sorry.
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